JP2010000909A - Washer device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washer device capable of always smoothly opening a check valve. <P>SOLUTION: The washer device is equipped with a tank for storing washer liquid, a pump for supplying the washer liquid in the tank to the outside, and two washer nozzles 20, 20' for jetting the washer liquid supplied from the pump. In the washer device, a liquid supply flow passage 25 and an outflow passage S which supply the washer liquid into a liquid jetting port 21a and one side washer nozzle 20' through an inflow passage G and a valve chest R from the inflow passage are formed on a nozzle housing 21 of the other side washer nozzle 20. The inflow passage, the liquid supply flow passage and the outflow passage are made openable/closable with the check valve 30 housed in the valve chest, and the lower end 32d of a cylindrical expansion/contraction part 32a of a valve element 32 of the check valve is locked between the lower end 23d and a lid body 24' of a valve case 23. A cylindrical guide part 24e for guiding the cylindrical expansion/contraction part 32a of the valve element 32 is provided to project on the lid body 24'. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a washer device that injects, for example, an automotive washer liquid (cleaning liquid) onto a cleaning surface such as a front windshield glass.

  As this type of washer device, there is one shown in FIGS. 3 to 5 (see, for example, Patent Document 1).

  As shown in FIG. 3, the washer device 10 includes a tank 11 for storing a washer liquid (cleaning liquid) W, and a pump 13 for supplying the washer liquid W in the tank 11 to the nozzle side (external) via a hose 12. And two washer nozzles 20, 20 ′ for injecting the washer liquid W supplied from the pump 13 onto a cleaning surface such as a front windshield glass (not shown). One washer nozzle 20 located on the side of the pump 13 transfers the washer liquid W supplied from the pump 13 to two liquid nozzles 21a of the nozzle housing 21 of the one washer nozzle 20 and the other washer nozzle 20 '. It has a washer liquid distribution function. The pump 13 and the other washer nozzle 20 'are connected in series via the hoses 14 and 15 to one washer nozzle 20 having the washer liquid distribution function.

  As shown in FIGS. 3 to 5, one washer nozzle 20 includes a substantially cylindrical inflow pipe 22 serving as an inflow path G for introducing the washer liquid W supplied from the pump 13, and a valve chamber from the inflow pipe 22. The washer liquid W is distributed into two via the substantially cylindrical valve case 23 and the lid 24 which are R, and supplied to the liquid jet port 21a and the other washer nozzle (external) 20 '. A nozzle housing 21 made of synthetic resin, each having a substantially cylindrical outflow pipe 26 to be an outflow path S to be supplied, and a valve chamber R are accommodated, and the inflow path G, the liquid supply flow path 25 and the outflow path S are connected. A check valve 30 that opens and closes, and a compression coil spring (elastic body) 33 that urges the check valve 30 in a direction to close the inflow path G, the liquid supply flow path 25, and the outflow path S are provided.

  As shown in FIGS. 4 and 5, the valve chamber R is made of a synthetic resin that covers a substantially cylindrical valve case 23 having a valve seat portion 23 a and a lower surface opening 23 b of the valve case 23. The lid 24 is formed to be a sealed space. Further, on the upper side of the valve seat portion 23 a of the valve case 23, an inflow pipe 22 that forms the inflow path G and an outflow pipe 26 that forms the outflow path S extend in a straight line through a cylindrical partition wall 27. Are integrally formed.

  Further, the valve seat 23 a of the valve case 23 has a circular communication port 25 a that allows the inflow path G of the inflow pipe 22 to communicate with the liquid supply flow path 25, and the outflow of the inflow path G of the inflow pipe 22 and the outflow pipe 26. A C-shaped communication port 26a for communicating the path S is formed. The circular communication port 25a between the inflow channel G of the inflow tube 22 and the liquid supply channel 25 and the C-shaped communication port 26a between the inflow channel G of the inflow tube 22 and the outflow channel S of the outflow tube 26 are The valve body 32 of the check valve 30, which will be described later, is closed / opened. The lid 24 is fixed by engaging the engaging recess 24c with the hook 23c formed integrally with the lower surface opening 23b of the valve case 23.

  Further, as shown in FIGS. 3 to 5, at the end portions of the inlet ports 22b and 22b ′ of the inflow pipes 22 and 22 ′ of the washer nozzles 20 and 20 ′, there are locking step portions 22c and hose locking portions, respectively. 22c 'is formed. Furthermore, a locking step portion 26c for locking the hose is formed at the end of the discharge port 26b of the outflow pipe 26 of the one washer nozzle 20. The pump 13 and the inflow pipe 22 of one washer nozzle 20 are connected by a hose 14, and the outflow pipe 26 of one washer nozzle 20 and the inflow pipe 22 ′ of the other washer nozzle 20 ′ are connected by a hose 15. ing.

  As shown in FIGS. 4 and 5, the check valve 30 includes a thick cylindrical body 31 made of synthetic resin, and a lower end and a lid body of the valve case 23 fitted into the upper large diameter portion 31 a of the body 31. And a rubber valve body 32 having a cylindrical expansion / contraction portion 32a locked between the two. A compression coil spring 33 is interposed between a recess 31 b formed in an annular groove shape on the lower surface of the main body 31 and a recess 24 b formed in an annular groove shape on the upper surface of the lid 24.

  Further, as shown in FIG. 3, the other washer nozzle 20 ′ has a substantially cylindrical shape serving as an inflow path G for introducing the washer fluid W supplied from the outflow pipe 26 of the one washer nozzle 20 through the hose 15. A synthetic resin nozzle housing 21 'is formed, each of which has an inflow pipe 22' and a liquid supply flow path 25 'that is bent at a substantially right angle from the end of the inflow pipe 22' and communicates with the liquid injection port 21a '. ing.

  According to the washer device 10 configured as described above, one washer nozzle 20 distributes the washer liquid W supplied from the pump 13 to the liquid injection port 21a of the nozzle housing of the one washer nozzle 20 and the other washer nozzle 20 '. At the time of use, the check valve 30 is brought into the inflow pipe 22 against the urging force of the compression coil spring 33 by the pressure of the washer liquid W introduced from the pump 13 into the inflow pipe 22 of the one washer nozzle 20. And the circular communication port 25a between the liquid supply flow channel 25 and the C-shaped communication port 26a between the inflow pipe 22 and the outflow pipe 26 are moved in the opening direction. As a result, as indicated by arrows in FIG. 5, the washer liquid W flows through the communication ports 25a and 26a into the liquid supply flow path 25 and the outflow pipe 26, respectively, and flows through the respective wash nozzles 20 and 20 '. The liquid is ejected from the liquid ejection ports 21a and 21a '.

  Further, when not in use (when the check valve 30 is stopped), as shown in FIG. 4, the inflow pipe is formed by the valve body 32 of the check valve 30 by the urging force of the compression coil spring 33 of one washer nozzle 20. The circular communication port 25a between the liquid supply channel 25 and the C-shaped communication port 26a between the inflow tube 22 and the outflow tube 26 is reliably closed.

JP 2008-80827 A

  However, in the conventional washer device 10, when the rubber valve body 32 of the check valve 30 is lowered and separated from the valve seat portion 23 a of the valve case 23 as shown in FIG. Since pressure (load) is applied to the cylindrical expansion / contraction part 32a of the body 32 and it is easy to bend inward, the check valve 30 may be opened poorly.

  Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a washer device that can always open and close the check valve smoothly.

  According to the first aspect of the present invention, a tank for storing the washer liquid, a pump for supplying the washer liquid in the tank to the outside, and a liquid injection port for injecting the washer liquid supplied from the pump onto the cleaning surface are formed. Two washer nozzles, an inflow path for introducing the washer liquid into a nozzle housing of the one washer nozzle, and the washer liquid divided into two through the valve chamber from the inflow path, and the liquid injection port A liquid supply flow path and an outflow path for supplying the washer liquid are respectively formed, and the inflow path, the liquid supply flow path and the outflow path are freely opened and closed by a check valve housed in the valve chamber, and the one The valve chamber of the washer nozzle is hermetically formed by a substantially cylindrical valve case having a valve seat portion and a lid that covers the lower surface opening of the valve case, and the substantially cylindrical valve case The valve seat portion is formed with a communication port for communicating the inflow channel and the liquid supply channel, and is formed with a communication port for communicating the inflow channel and the outflow channel. The communication port of the inflow path and the outflow path is freely closed and opened by the valve body of the check valve, and the lower end of the cylindrical expansion / contraction part of the valve body is engaged between the lower end of the valve case and the lid body. In the stopped washer device, a cylindrical guide portion for guiding the cylindrical expansion and contraction portion of the valve body is protruded from the lid body.

  The invention according to claim 2 is the washer device according to claim 1, wherein the cylindrical expansion and contraction portion of the valve body is formed in a cylindrical shape formed from a bellows portion formed at an upper end portion and from the bellows portion to a lower end portion. And a cylindrical guide part of the lid projecting up to the bellows part of the cylindrical expansion / contraction part.

  As described above, according to the first aspect of the present invention, the cylindrical body of the check valve is formed on the lid that covers and seals the bottom opening of the substantially cylindrical valve case having the valve seat. By projecting a cylindrical guide portion that guides the expansion / contraction portion of the valve body, when the valve body of the check valve is opened away from the valve seat portion of the valve case, the cylindrical expansion / contraction portion of the valve body is Since the guide is guided by the cylindrical guide portion of the lid, the valve body can be smoothly opened without applying a load to the cylindrical expansion and contraction portion of the valve body and bending inward. As a result, the check valve can be smoothly opened and closed when the inflow passage, the liquid supply passage and the outflow passage are opened and closed by the check valve housed in the valve chamber.

  According to invention of Claim 2, the cylindrical expansion-contraction part of a valve body is integrally formed by the bellows part formed in the upper end part, and the cylindrical trunk | drum part formed from this bellows part to the lower end part, By projecting the cylindrical guide part of the body up to the bellows part of the cylindrical expansion / contraction part, the expansion / contraction of the valve body when the valve body moves away from the valve seat part of the valve case and becomes open Since the cylindrical body part of the part is guided by the cylindrical guide part of the lid body, a load is applied to the cylindrical body part of the expansion / contraction part of the valve body, and the expansion / contraction part does not flex inward, The valve body can always be opened smoothly.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a sectional view showing a closed state of a check valve of a washer nozzle having a washer liquid distribution function used in a washer device according to an embodiment of the present invention, and FIG. 2 shows an opened state of the check valve of the washer nozzle. It is sectional drawing shown, and the washer apparatus shown in FIG. 3 is used.

  As shown in FIGS. 1 and 2, one washer nozzle 20 used in the washer device 10 includes a substantially cylindrical inflow pipe 22 serving as an inflow path G for introducing the washer liquid W supplied from the pump 13, and A liquid supply flow path 25 that distributes the washer liquid W into two via the substantially cylindrical valve case 23 and the lid body 24 ′ from the inflow pipe 22 to the valve chamber R and supplies the liquid to the liquid ejection port 21 a and the other washer. A nozzle housing 21 made of synthetic resin, each having a substantially cylindrical outflow pipe 26 to be an outflow path S to be supplied to the nozzle (outside) 20 ′, respectively, and stored in the valve chamber R, the inflow path G and the liquid supply flow A check valve 30 that opens and closes the passage 25 and the outflow passage S, and a compression coil spring (elastic body) 33 that urges the check valve 30 in a direction to close the inflow passage G, the liquid supply passage 25 and the outflow passage S. And with There.

  The valve chamber R was sealed with a substantially cylindrical valve case 23 having a valve seat portion 23a and a synthetic resin-made substantially circular dish-like lid body 24 'covering the lower surface opening 23b of the valve case 23. It is formed to be a space. Further, on the upper side of the valve seat portion 23 a of the valve case 23, an inflow pipe 22 that forms the inflow path G and an outflow pipe 26 that forms the outflow path S extend in a straight line through a cylindrical partition wall 27. Are integrally formed. Further, the valve seat 23 a of the valve case 23 has a circular communication port 25 a that allows the inflow path G of the inflow pipe 22 to communicate with the liquid supply flow path 25, and the outflow of the inflow path G of the inflow pipe 22 and the outflow pipe 26. A C-shaped communication port 26a for communicating the path S is formed. The circular communication port 25a between the inflow channel G of the inflow tube 22 and the liquid supply channel 25 and the C-shaped communication port 26a between the inflow channel G of the inflow tube 22 and the outflow channel S of the outflow tube 26 are The valve body 32 of the check valve 30, which will be described later, is closed / opened. Further, the lid body 24 ′ is fixed by engaging the engaging recess 24 c with the hook portion 23 c formed integrally with the lower surface opening 23 b of the valve case 23.

  As shown in FIGS. 1 and 2, the check valve 30 includes a thick cylindrical body 31 made of synthetic resin, and a lower end 23 d and a lid of the valve case 23 fitted into the upper large diameter portion 31 a of the body 31. A rubber valve body 32 having a cylindrical bellows part (expandable part) 32a locked between the body 24 'and the body 24'. A compression coil spring 33 is interposed between the cylindrical portion 31b integrally formed on the lower surface of the upper large-diameter portion 31a of the main body 31 and the concave portion 24b formed in an annular groove shape on the upper surface 24a of the lid 24 '. It is.

  The cylindrical expansion / contraction part 32a of the rubber valve body 32 includes a bellows part 32b formed at the upper end part and a cylindrical body part 32c integrally formed from the bellows part 32b to the lower end part. The lower end 32d of the cylindrical body 32c of the valve body 32 is locked between the lower end 23d of the valve case 23 and the bottom 24d of the lid 24 '. A cylindrical guide portion 24e is integrally formed on the outer peripheral side of the upper surface 24a of the lid 24 'so as to extend to the bellows portion 32b of the cylindrical expansion / contraction portion 32a of the valve body 32. In addition, since the other structure is the same as that of the said prior art example, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted.

  According to the washer device 10 of the above embodiment, one washer nozzle 20 applies the washer liquid W supplied from the pump 13 to the liquid injection port 21a of the nozzle housing of the one washer nozzle 20 and the other washer nozzle 20 '. At the time of use, the check valve 30 is inflow pipe against the urging force of the compression coil spring 33 by the pressure of the washer liquid W introduced from the pump 13 into the inflow pipe 22 of the one washer nozzle 20. It moves to the direction which opens the circular communication port 25a of 22 and the liquid supply flow path 25, and the C-shaped communication port 26a of the inflow tube 22 and the outflow tube 26. More specifically, when the rubber valve body 32 of the check valve 30 is lowered against the urging force of the compression coil spring 33, the rubber valve body 32 of the check valve 30 is moved to the valve seat portion of the valve case 23. It will be in an open state away from 23a.

  When the valve body 32 moves in a direction away from the valve seat portion 23a of the valve case 23 to be in the open state, the cylindrical body portion 32c of the expansion / contraction portion 32a of the valve body 32 is the cylindrical shape of the lid body 24 '. Since it is guided by the guide part 24e, pressure (load) is not applied to the cylindrical body part 32c of the expansion / contraction part 32a of the valve body 32, and the body part 32c and the bellows part 32b do not bend inwardly. 32 can always be opened smoothly. As a result, as indicated by arrows in FIG. 2, the washer liquid W flows through the communication ports 25a and 26a, branches into the liquid supply flow path 25 and the outflow pipe 26, and flows through the respective wash nozzles 20 and 20 '. The liquid is ejected from the liquid ejection ports 21a and 21a '.

  When not in use (when the check valve 30 is stopped), as shown in FIG. 1, the check valve 30 is urged by the urging force of the compression coil spring 33 of one washer nozzle 20. The circular communication port 25a between the inflow tube 22 and the liquid supply channel 25 and the C-shaped communication port 26a between the inflow tube 22 and the outflow tube 26 can be reliably closed by the body 32. That is, since the rubber valve body 32 of the check valve 30 comes into contact with the valve seat portion 23a of the valve case 23 and closes, the one check valve 30 of the one washer nozzle 20 has two washer nozzles 20. , 20 'can be reliably prevented from flowing backward.

It is sectional drawing which shows the closed state of the non-return valve of the washer nozzle with a washer liquid distribution function used for the washer apparatus of one Embodiment of this invention. It is sectional drawing which shows the open state of the non-return valve of the said washer nozzle. It is a block diagram which shows the conventional washer apparatus. It is sectional drawing which shows the closed state of the non-return valve of the washer nozzle with a washer liquid distribution function used for the said conventional washer apparatus. It is sectional drawing which shows the open state of the non-return valve of the said conventional washer nozzle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Washer apparatus 11 Tank 13 Pump 14,15 Hose 20 One washer nozzle 20 'The other washer nozzle 21 Nozzle housing 21a Liquid injection port 22 Inflow pipe (inflow channel)
23 Valve case (valve chamber)
23a Valve seat part 23b Lower surface opening part 23d Lower end 24 'Lid 24e Cylindrical guide part 25 Liquid supply flow path 25a Communication port 26 Outflow pipe (outflow path)
26a Communication port 30 Check valve 32 Valve body 32a Cylindrical expansion / contraction part 32b Bellows part 32c Cylindrical body part 33 Compression coil spring (elastic body)
G inflow path R valve chamber S outflow path W washer fluid

Claims (2)

A tank for storing the washer liquid, a pump for supplying the washer liquid in the tank to the outside, and two washer nozzles forming a liquid injection port for injecting the washer liquid supplied from the pump onto the cleaning surface ,
A liquid for supplying the washer liquid to the liquid injection port by distributing the two parts of the washer liquid into the nozzle housing of the one washer nozzle through the valve chamber through the inflow path for introducing the washer liquid. Forming a supply flow path and an outflow path, respectively, and opening and closing the inflow path and the liquid supply flow path and the outflow path with a check valve housed in the valve chamber;
Further, the valve chamber of the one washer nozzle is hermetically formed by a substantially cylindrical valve case having a valve seat portion and a lid covering the lower surface opening of the valve case, and the substantially cylindrical valve case And a communication port for communicating the inflow channel and the outflow channel, and a communication port for connecting the inflow channel and the liquid supply channel. And the communication port of the inflow path and the outflow path can be closed and opened freely by the valve body of the check valve, and the lower end of the cylindrical expansion / contraction part of the valve body is between the lower end of the valve case and the lid body. In the locked washer device,
A washer device, characterized in that a cylindrical guide portion for guiding a cylindrical expansion / contraction portion of the valve body is provided on the lid. The washer device according to claim 1,
A cylindrical expansion / contraction portion of the valve body is integrally formed by a bellows portion formed at an upper end portion and a cylindrical body portion formed from the bellows portion to a lower end portion, and the cylindrical guide portion of the lid body A washer device, characterized in that a projection is provided up to the bellows part of the cylindrical expansion and contraction part.

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